<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class City extends Model
{
    use HasFactory;

    protected $title = 'city';

     //城市列表的子城市
    public function children(){
        return $this->hasMany(City::class,'pid','id');
    }
}
